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authorIvan T. Ivanov <iivanov@mm-sol.com>2014-12-16 13:21:55 +0300
committerMark Brown <broonie@kernel.org>2014-12-29 20:14:21 +0300
commit0667dd5f6c203480f2e8dcb3fc039ef723453a2f (patch)
tree7184c21dea2e5e74f21ae026fddbb9c208b601e0 /drivers/spi/spi-qup.c
parent97bf6af1f928216fd6c5a66e8a57bfa95a659672 (diff)
downloadlinux-0667dd5f6c203480f2e8dcb3fc039ef723453a2f.tar.xz
spi: qup: Add SPI_CPOL configuration support
Device support SPI_CPOL, but driver have missed to add support for this configuration. Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-qup.c')
-rw-r--r--drivers/spi/spi-qup.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index e7fb5a0d2e8d..ff9cdbdb6672 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -337,7 +337,7 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
{
struct spi_qup *controller = spi_master_get_devdata(spi->master);
- u32 config, iomode, mode;
+ u32 config, iomode, mode, control;
int ret, n_words, w_size;
if (spi->mode & SPI_LOOP && xfer->len > controller->in_fifo_sz) {
@@ -392,6 +392,15 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer)
writel_relaxed(iomode, controller->base + QUP_IO_M_MODES);
+ control = readl_relaxed(controller->base + SPI_IO_CONTROL);
+
+ if (spi->mode & SPI_CPOL)
+ control |= SPI_IO_C_CLK_IDLE_HIGH;
+ else
+ control &= ~SPI_IO_C_CLK_IDLE_HIGH;
+
+ writel_relaxed(control, controller->base + SPI_IO_CONTROL);
+
config = readl_relaxed(controller->base + SPI_CONFIG);
if (spi->mode & SPI_LOOP)